Experimental Analysis of Microhabitat Selection by Juvenile Steelhead (Oncorhynchus mykiss) and Coho Salmon (O. kisutch) in a British Columbia Stream
Experimental Analysis of Microhabitat Selection by Juvenile Steelhead (Oncorhynchus mykiss) and Coho Salmon (O. kisutch) in a British Columbia Stream
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不列颠哥伦比亚溪流中幼年钢头鱼 (Oncorhynchus mykiss) 和银鲑鱼 (O. kisutch) 微生境选择的实验分析
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发表时间：
1993
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影响因子：
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通讯作者：
K. Fausch
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作者：
K. Fausch
1990年初夏，在不列颠哥伦比亚省的鲑鱼河进行了重复实验，以测试速度庇护、视觉隔离和架空覆盖对钢头鲑（Oncorhynchus mykiss）和0岁的coho Salmon （O. kisutch）选择微栖息地的相对重要性。四种类型的人造有机玻璃结构，前三种相同的结构，有不同的部分涂漆，以增加栖息地的复杂性：单独的速度避难所，具有视觉隔离的速度避难所，所有三种特征相结合，以及单独的头顶覆盖物。钢头parr选择结构与顶盖单独或所有三个特点明显比那些没有顶盖。Steelhead还选择了接近最快速度的结构和最接近其他自然架空覆盖物的结构，这是在不同地点使用相同结构的最大差异。相比之下，很少有0岁的银鲑使用任何结构。那些选择了这三个的人……
Replicate experiments were conducted in the Salmon River, British Columbia, during early summer 1990 to test the relative importance of velocity refuge, visual isolation, and overhead cover to microhabitat selection by steelhead (Oncorhynchus mykiss) parr and age-0 coho salmon (O. kisutch). Four types of artificial Plexiglas structures, the first three of identical construction, had different portions painted to provide increasing habitat complexity: velocity refuge alone, velocity refuge with visual isolation, all three features combined, and overhead cover alone. Steelhead parr selected structures with overhead cover alone or all three features significantly more often than those without overhead cover. Steelhead also selected structures adjacent to the swiftest velocities available and closest to other natural overhead cover, which accounted for most differences in use of the same structure in different locations. In contrast, few age-0 coho salmon used any structures. Those that did selected the three...